Edward r



@uiten g1g-frs strat @fitter EDWARD n. HOLZER, 0F PHILADELPHIA,PENNSYLVANIA.

Letters Patent No. 77,733, dated Ilfag/ 12, 1868.

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"diie Situatie-nient tn .ixi these ettersntent mit uniting @im nt thesume.

` TO ALL WHOM IT MAY CONCERN:

Be it known that I, EDWARD R. HLZER, of' Philadelphia;Pennsylvania, haveinvented certain Improvements in scaffold; and I-do hereby declare'thefiollowing to be a full,-fclear,`..and exact description of thesaine.

My invention consists of asca'old, composed-ot" aseries ot`- posts,eadb"liin'ged. to avbase-piece resting en the ground, 'and on each ofwhich slides a brackct'foruthe support o fla platform{'tlicwhole beingconstructed a'nd arranged, substantially as described hereafter, sofasto'fformla light, portable-,and safe 'eontrivance for supportingplanks'in front ot a building.- l l i In order t4 enable others to makeand use'my'inrcntion, I will now proc-eed to describeJ the modecfconstructng and using vth'e same, rei'crence'being-hza'd totheaceompatrying-drawing, whicnforms a pai-tof this specification, and inwhichv 'l A Figure 1' is aside view ot' my improxl'ed'scaold.

Figure 2, a sectional elevation of the same.' v

Figure-3, a sectional plan .view on the line 1 2, fig. 2.; and

Figure -4 represents one ot' the posts of the's'catilold, with thesections detached from each other.

A is one of the posts ot' the scaffold, and is pivotcd at the lower en dto a base, B51 the posts, as secnin iigs. 1 and 2, consisting of threesections, 'a, al, and a?, fitted to each other, as shown, and securedtogether by suitable bolts, b. The number of these sections may`beincreased o r diminished, so as to lengthen orshorten the post,according to thc height of the building'against which it has to bc'erected,th'e upper section aand lowest section, a2, however, beingalways 'a portion of' thc post,A no matterhow manyintermediate sectionsthere may be between them. f

A bracket, C, is arrangedito slide up and down the post, in theopposite'sides of which are grooves, e, for 'receiving the lbent .endsof plates 4c, secured to the bracket. l A

This bracket is operated by means of blocks and tackle, one ot' theblocks, being secured to the bracket, J

and thc other block, d', to the uppermostsection, a, of the post.

In raising the post to the wall,` X, against which it is to be placed,the operation is facilitated by the base piece B, which rests upon thesurface of the ground, and bears with one end against the wall of thebuilding,

ashownvin iig. 1. When elevated to a vertical position, thc postmay besecured by inserting the bent ends of the rodsf(the opposite ends ofwhich are. connected to thc postl'into the eyes ot" the shutter-hinges,or, when therear-inooutside shutters, the rodsfmaybe connected byAlightscrews to .thcsills' of thc window-frames.

Two or more of these posts, A, are tliussecurcd in front of the buildingupon which it is intended to work,

and the platform on which the workmen stand is laid upon the brackets,C, andvmay be raised or lowered t o any desired extent by means ofthebloeksand tackle-illustrated and described. To prevent accidentswhich might occur-from the yielding of the tackle, a. rack, g, is letinto the outer face of the post against which the bracket fbe'ars, andto the latter is hung a pearl, i, thc point of whchis adapted to theteetlrot' the rack, and prevents the' bracket from descending until'thepawl, by operating its' long arm, is' moved away from the rack; thc endofthis arm being connectedto a rod, j, which passes through theupperportion of thc bracket, and on the outer end of .which is anenlargement, so' that the operator, stand? ing on the platform, can,while handling the'tackle-to raise or lower the bracket, controlthcipawl bythe 'tv-oe of his boot', which can be insertedA beneath theenlargemcnt of the rod, j.

In some instances it may be desirable t'o have the brackets, C, andtheir platform in .close proximity to the walls of the building; inwhich casethe posts are reversed,'lso that the brackets shall be betweenthemhnd the wall. Towards the `lower ends of the .posts the` grooves, e,for guiding the bracketsyare discontinued, so that,-on lowering thebracket to the base, it may be at once detached from the post byfmovingit outwards from ihelatter.

Itwill be evident that my invention possesses the'advantage of beinglight and portable, and of being 'readily erected in und secured to thefront of the building.

The bracket is provided with a roller, tm, which bears againstithe faceof the post, and prevents the lowerA portion ofthe bracket from comingin 4contact therewith; Undue friction, which would otherwise interferewith the free movement of the bracket, is consequentlyprevent'ed.

I do not claim an adjustable platform slidingon a post, the use-ofblocks and tackle f0.1' adjusting such platform, or a paivl on theplatform adapted to a ratchet on the post; but

I claim asmy invention, and.y desire to secure by Letters Patent-- 1. Asca'old, consisting of two or more posts, A, each hinged to a base, IB,resting on the ground, and to each. of which islsecurecl an adjustablebracket, C, all substantially as described.

2. The grooves @arranged in opposite sides'of the post, for tbereception of the bent ends of the plates on the brackets,.as set forth.l y

rIn testimony w hereof,`I have signed my name to this specification inthe presence of two lsubscribing witnesses.

EDWARD R. HOLZER.,

i Witnesses:

H. HowsoN, W. J. R. DELANY.

